Home / 15,458.78-21,317.09-13,228.04

Finding the Fourth Proportional to 15,458.78, 21,317.09 and 13,228.04

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Solution

The fourth proportional to 15,458.78, 21,317.09 and 13,228.04 is: 18,240.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,458.78 : 21,317.09 = 13,228.04 : x
  2. Step 2: Convert to fraction form
    15,458.78/21,317.09 = 13,228.04/x
  3. Step 3: Cross multiply
    15,458.78x = 21,317.09 × 13,228.04
  4. Step 4: Simplify right side
    15,458.78x = 281,983,146.48
  5. Step 5: Solve for x
    x = 281,983,146.48/15,458.78
  6. Step 6: Final answer
    x = 18,240.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.